Datasheet

LTM4619
15
4619fb
For more information www.linear.com/LTM4619
applicaTions inForMaTion
Figure 7. Power Loss at 1.5V Output Figure 8. Power Loss at 3.3V Output
LOAD CURRENT (A)
0
POWER LOSS (W)
3.0
2.5
1.5
0.5
2.0
1.0
0
642
4619 F07
8
6V LOSS
12V LOSS
LOAD CURRENT (A)
0
POWER LOSS (W)
4.5
2.5
3.0
3.5
4.0
1.5
0.5
2.0
1.0
0
642
4619 F08
8
12V LOSS
24V LOSS
Table 2. 1.5V Output
DERATING CURVE V
IN
(V) POWER LOSS CURVE AIRFLOW (LFM) HEATSINK
Θ
JA
(°C/W)
Figures 9, 11 6, 12 Figure 7 0 none 12.8
Figures 9, 11 6, 12 Figure 7 200 none 9.0
Figures 9, 11 6, 12 Figure 7 400 none 8.0
Figures 10, 12 6, 12 Figure 7 0 BGA Heatsink 11.9
Figures 10, 12 6, 12 Figure 7 200 BGA Heatsink 8.4
Figures 10, 12 6, 12 Figure 7 400 BGA Heatsink 7.4
Table 3. 3.3V Output
DERATING CURVE V
IN
(V) POWER LOSS CURVE AIRFLOW (LFM) HEATSINK
Θ
JA
(°C/W)
Figures 13, 15 12, 24 Figure 8 0 none 13.4
Figures 13, 15 12, 24 Figure 8 200 none 9.6
Figures 13, 15 12, 24 Figure 8 400 none 8.5
Figures 14, 16 12, 24 Figure 8 0 BGA Heatsink 12.5
Figures 14, 16 12, 24 Figure 8 200 BGA Heatsink 8.9
Figures 14, 16 12, 24 Figure 8 400 BGA Heatsink 7.9
HEATSINK MANUFACTURER PART NUMBER WEBSITE
Aavid Thermalloy 375424B00034G www.aavidthermalloy.com
Cool Innovations 4-050503P to 4-050508P www.coolinnovations.com